I, too, would worry that he would tie his stomach in knots. I have a kitty, Allie, that is like this. Her 'love' is of DENTAL FLOSS! She goes crazy to get to me, to the floss, in the trash, etc. Even when it smells of menthol. ODD.

So, it seems as if your kitty has a thing for thread. Could it be Kolo sees you using the machine, and wants the attention? Could it be you are using unbleached cotton thread, that bears the smell of the outdoors? Who knows. I wonder if you will ever figure out his love of all things cotton.

Better to just be extra viligant with keeping it covered. My machine has a cover that latches on...does yours?

Good luck, welcome to PT, and give us some pictures!!